The long-awaited findings show strong support for the standard model of cosmology — with one exception. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...

The discovery that the universe extends beyond the Milky Way galaxy was a pivotal moment in astronomy. In 1925, astronomer Edwin Hubble identified a Cepheid variable star, known as V1, in the ...

Delta Cephei, the archetype Cepheid variable star, is located in the constellation Cepheus, a circumpolar constellation visible in the northern sky. Delta Cephei's position can be determined relative ...